I am a former Marine and Iraq war veteran diagnosed with PTSD. I was recently turned on to dogs that are trained in helping with PTSD symptoms. After doing extensive research I found that the companies providing dogs free of charge have a wait list 200 miles long. The other option I have is to buy one already trained but that isn't an option as they can cost up to $30,000. So I have decided to get a puppy and have it trained, still expensive but a fraction of the $30,000.

What breeds would be best suited for this type of training? Should I go through a breeder or would a pound puppy suffice?